Home / 3,970.38-5,479.31-2,201.88

Finding the Fourth Proportional to 3,970.38, 5,479.31 and 2,201.88

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Solution

The fourth proportional to 3,970.38, 5,479.31 and 2,201.88 is: 3,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.38 : 5,479.31 = 2,201.88 : x
  2. Step 2: Convert to fraction form
    3,970.38/5,479.31 = 2,201.88/x
  3. Step 3: Cross multiply
    3,970.38x = 5,479.31 × 2,201.88
  4. Step 4: Simplify right side
    3,970.38x = 12,064,809.15
  5. Step 5: Solve for x
    x = 12,064,809.15/3,970.38
  6. Step 6: Final answer
    x = 3,038.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.